CN108043185A - A kind of processing system of waste gas containing VOC and the processing method realized using the system - Google Patents

A kind of processing system of waste gas containing VOC and the processing method realized using the system Download PDF

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Publication number
CN108043185A
CN108043185A CN201711317708.XA CN201711317708A CN108043185A CN 108043185 A CN108043185 A CN 108043185A CN 201711317708 A CN201711317708 A CN 201711317708A CN 108043185 A CN108043185 A CN 108043185A
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China
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voc
exhaust gas
waste gas
pipe
tower
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CN201711317708.XA
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CN108043185B (en
Inventor
刘欣
陈晶
仲建强
张�杰
张小琴
张晓东
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Shandong Aviation Industry Science And Technology Co Ltd
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Shandong Aviation Industry Science And Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/869—Multiple step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/106—Peroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/41—Further details for adsorption processes and devices using plural beds of the same adsorbent in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The invention discloses the processing systems and processing method of a kind of waste gas containing VOC, including waste gas pre-treating device, and VOC processing units, the VOC processing units are connected to the downstream position of the waste gas pre-treating device, and the VOC processing units include the photocatalytic degradation VOC units being serially connected and absorption VOC units.Including the present invention first with waste gas pre-treating device by sulfur dioxide, the NO in exhaust gasX, the impurity such as dust handled, then will treated that exhaust gas is directed into VOC processing units, carry out photocatalytic degradation, remaining VOC is adsorbed, and the present invention substantially increases the treatment effect containing VOC exhaust gas.

Description

A kind of processing system of waste gas containing VOC and the processing method realized using the system
Technical field
It is the present invention relates to the processing system of technical field of waste gas treatment more particularly to a kind of waste gas containing VOC and using this The processing method that system is realized.
Background technology
VOC is the english abbreviation of volatile organic compounds (volatile organic compounds).Common meaning On VOC be exactly to refer to volatile organic matter；But the definition on environment protection significance refers to active a kind of volatile organic matter, i.e., can Generate that a kind of volatile organic matter of harm.
VOC is huge to body effect, when the VOC in room reaches a certain concentration, in the short time people can feel headache, It is nauseous, weak etc., it is seriously to be present with twitch, stupor, and the liver, brain, nervous system of people are hurt, memory is caused to subtract The serious consequences such as move back.Volatility VOC also human body is good for it is existing influence to be to stimulate eyes and respiratory tract, pharyngalgia with weak, wherein Further comprise many carcinogens.
Coal-burning power plant is one of important sources of volatile organic contaminant, and the VOC of discharge accounts about artificial total discharge The 37% of amount.VOC is not only directly detrimental to health, and under the conditions of intense light irradiation, low wind speed, low humidity etc., easy and nitrogen Photochemical reaction occurs for oxide, forms photochemical fog, causes secondary pollution.All strictly legislation limits it for countries in the world at present Discharge, such as the U.S. 1990《Clean Air Act Amendment》The discharge capacity that the law of neutrality defines 189 kinds of pollutants will reduce 90%, wherein 70% pollutant belongs to VOC.
Also occurs the processing unit for being much directed to VOC at present.For example, the patent of Patent No. 201610721884.9 discloses A kind of VOC exhaust treatment systems, belong to technical field of air purification.VOC exhaust treatment systems include the spiral being sequentially connected Shape ultraviolet light pipe, spiral shape photocatalyst pipe.VOC exhaust treatment systems provided by the invention substantially increase purification efficiency. But in actual industrial waste gas, not only contain VOC, also containing other pernicious gases.Moreover, sulfur dioxide in exhaust gas, NOXDeng can all be impacted to the processing of VOC.At present, for SO in flue gas2Treatment technology it is wet with limestone/lime-gypsum Based on method, treatment effeciency is higher, but to NOXRemoval efficiency it is very low, mainly due to NOXThe accounting of middle NO is up to more than 90%, And NO is practically insoluble in water also not with alkaline reaction, in turn results in NOXRemoval efficiency it is low, and need to be separately provided processing dress It puts.At this stage, for NO in flue gasXProcessing (denitrating flue gas) technology be mostly：SCR (selective catalytic reduction), SNCR (choosings Selecting property non-catalytic reduction), the technologies such as Ozonation, SCR and SNCR technologies reducing agent has temperature window with NOX reactions higher It is required that the flue gas of the discharges such as some Industrial Boilers, Industrial Stoves, coking furnace, sintering machine is just needed to heat up to flue gas, pin For SNCR, SCR, reducing agent is stored with certain danger, for Ozonation, does not only exist certain danger Property, and easily cause secondary pollution；Meanwhile height is invested, energy-output ratio is big, and takes up a large area.The quality of doctor solution is to flue gas Middle SO2Treatment effect influence it is very big.
Therefore, the processing method developed a kind of processing system of new waste gas containing VOC and realized using the system, is not only had Urgent researching value, it may have good economic benefit and commercial application potentiality, this is exactly the power that the present invention is accomplished Place and basis.
The content of the invention
The defects of in order to overcome the prior art as indicated above, the present inventor has made intensive studies this, is paying After a large amount of creative works, so as to complete the present invention.
Specifically, the technical problems to be solved by the invention are：Processing system and the utilization of a kind of waste gas containing VOC are provided The processing method that the system is realized, to improve the treatment effect of waste gas containing VOC.
In order to solve the above technical problems, the technical scheme is that：
In a first aspect, the present invention provides a kind of processing system of waste gas containing VOC, including
Waste gas pre-treating device,
And VOC processing units, the VOC processing units are connected to the downstream position of the waste gas pre-treating device, institute Stating VOC processing units includes the photocatalytic degradation VOC units being serially connected and absorption VOC units.
In the present invention, as a kind of perferred technical scheme, the photocatalytic degradation VOC units include
Housing, the housing enclose be set as exhaust gas by passage, the housing is provided with air inlet and gas outlet；
Filter screen, the filter screen are arranged at the air inlet position, and the filter screen is detachable is plugged in a peace It frames up in seat；
Level-one photocatalysis net, the cross section of the level-one photocatalysis net is wavy, and the level-one photocatalysis net is with giving up Flow of air direction right angle setting is mounted on ultraviolet lamp at left and right sides of the level-one photocatalysis net；
Photocatalytic plate, the cross section of the photocatalytic plate is polyline shaped, and the photocatalytic plate is put down with exhaust gas flow direction Row installation, the both sides up and down of the photocatalytic plate are mounted on ultraviolet lamp, and ultraviolet lamp grouping is set, and every group purple The folding face of outer smooth lamp and the photocatalytic plate is oppositely arranged one by one；
And two level photocatalysis net, the cross section of the two level photocatalysis net are wavy, and the two level photocatalysis net With exhaust gas flow direction right angle setting, ultraviolet lamp is mounted at left and right sides of the two level photocatalysis net.
In the present invention, as a kind of perferred technical scheme, the filter screen is clamped in the installation using clamping lever In skeleton frame.
In the present invention, as a kind of perferred technical scheme, the level-one photocatalysis net and two level photocatalysis net use Cellular ceramic wafer, the surface spraying of the ceramic wafer have titanium dioxide.
In the present invention, as a kind of perferred technical scheme, the photocatalytic plate is coated with catalysis using two surfaces The aluminum substrate of coating, the catalyst coatings are prepared by following components：
Reflective insulation powder 10-15 parts by weight；
Antirusting powder 5-7 parts by weight；
Polyaniline corrosion inhibiter 15-25 parts by weight；
Drier 3-5 parts by weight；
Nanometer titanium dioxide titanium valve 7-12 parts by weight.
In the present invention, as a kind of perferred technical scheme, the absorption VOC units include
Toroidal shell is equipped with inside the toroidal shell and utilizes stepper motor driven conveyer belt, and the circular casing The inner utilization partition plate of body is divided into several isolated areas；
Adsorbing agent carrier plate, the adsorbing agent carrier plate are installed on the conveyer belt, and the adsorbing agent carrier plate is equal It is correspondingly arranged with each isolated area, the both ends of the adsorbing agent carrier plate are respectively provided with realizes sealing with the partition plate bottom edge Diaphragm seal；
Exhaust gas temporary storage tank, the exhaust gas temporary storage tank are connected with the housing outlets of the photocatalytic degradation VOC units, and described The outlet of exhaust gas temporary storage tank is provided with solenoid valve；
Exhaust gas inlet pipe, one end of the exhaust gas inlet pipe and the outlet of the exhaust gas temporary storage tank, other end connection One of isolated area of the toroidal shell, exhaust gas is directed into toroidal shell；
Waste gas outlet pipe, an isolated area of the Waste gas inducing pipe connection away from the exhaust gas inlet pipe, to incite somebody to action Exhaust gas is exported to outside toroidal shell；
Waste gas inducing pipe, the Waste gas inducing pipe have more, adjacent only between connection exhaust gas inlet pipe, waste gas outlet pipe Vertical region, and interlaced arrangement above and below the adjacent Waste gas inducing pipe；
It is desorbed steam inlet pipe, the independent zones that the desorption steam inlet pipe connection does not connect with the Waste gas inducing pipe Domain；
And desorption steam outlet pipe, the desorption steam outlet pipe connection connect only with the desorption steam inlet pipe Vertical region, and be oppositely arranged with the desorption steam inlet pipe.
In the present invention, as a kind of perferred technical scheme, the absorption VOC units further include switch board, the control Cabinet connects the stepper motor and the solenoid valve using pilot, and the stepper motor is controlled to drive conveyer belt stepping fortune It is dynamic, the adsorbing agent carrier plate is moved in next isolated area, and institute is cut off while the stepper motor works State solenoid valve.
In the present invention, as a kind of perferred technical scheme, the adsorbing agent carrier plate is loaded with adsorbent, the absorption Agent uses modified active carbon fiber, and the preparation method of the modified active carbon fiber is：By activated carbon fibre 120 in drying box When freeze-day with constant temperature 1 is small under the conditions of DEG C, with the hydrogen peroxide dipping 64h of 30% (W/V), then, every time with distilled water immersion three times 25min, to wash off remaining hydrogen peroxide.Constant temperature drying under the conditions of 100 DEG C is subsequently placed in drying box.
In the present invention, as an improvement, the waste gas pre-treating device includes desulfurizing tower, the bottom of the desulfurizing tower Equipped with air inlet pipe, the downstream of the desulfurizing tower is equipped with oxidizing tower and absorption tower successively, between the desulfurizing tower and the oxidizing tower Equipped with the first snorkel, the both ends of first snorkel connect respectively with the top of the desulfurizing tower and the bottom of the oxidizing tower It is logical, be equipped with the second snorkel between the oxidizing tower and the absorption tower, the both ends of second snorkel respectively with the oxygen The top for changing tower connect with the bottom on the absorption tower, the top on the absorption tower equipped with exhaust pipe, the exhaust pipe with it is described The housing inlet port connection of photocatalytic degradation VOC units；
Doctor solution spray equipment is additionally provided on the desulfurizing tower, oxidation solution spray equipment, institute are additionally provided on the oxidizing tower It states and sodium base absorbing liquid spray equipment is additionally provided on absorption tower；
Mixing concentration basin is further included, the one side of the mixing concentration basin is equipped with sedimentation basin, and the one side of the sedimentation basin is equipped with Clear water reserviors, the clear water reserviors are equipped with water circulating pump；The sedimentation basin is equipped with coagulant and adds in pipe and flocculation aid addition pipe；
The bottom of the desulfurizing tower, the oxidizing tower and the absorption tower is communicated with delivery pipe, the delivery pipe it is another One end is extended in the mixing concentration basin.
As an improvement the doctor solution spray equipment includes the first tank body, desulfurization is loaded in first tank body Liquid is equipped with doctor solution delivery pipe between first tank body and the desulfurizing tower, it is dynamic that the doctor solution delivery pipe is equipped with first Power pumps；The first spray tube connected with the doctor solution delivery pipe is equipped in the desulfurizing tower, first spray tube is close to institute The top for stating desulfurizing tower is set, and first spray tube is equipped with several first nozzles；
The oxidation solution spray equipment includes the second tank body, and oxidation solution, second tank are loaded in second tank body Oxidation solution delivery pipe is equipped between body and the oxidizing tower, the oxidation solution delivery pipe is equipped with the second kinetic pump；The oxidation The second spray tube connected with the oxidation solution delivery pipe is equipped in tower, second spray tube is close to the top of the oxidizing tower It sets, second spray tube is equipped with several second nozzles；
The sodium base absorbing liquid spray equipment includes the 3rd tank body, and sodium base absorbing liquid, institute are loaded in the 3rd tank body It states and sodium base absorbing liquid delivery pipe is equipped between the 3rd tank body and the absorption tower, the sodium base absorbing liquid delivery pipe is equipped with the 3rd Kinetic pump；The 3rd spray tube connected with the sodium base absorbing liquid delivery pipe, the 3rd spray tube are equipped in the absorption tower It is set close to the top on the absorption tower, the 3rd spray tube is equipped with several 3rd nozzles；
The agitating shaft of motor drive, institute are equipped on first tank body, second tank body and the 3rd tank body Agitating shaft is stated equipped with agitating vane.
As a further improvement, the doctor solution delivery pipe, the oxidation solution delivery pipe and the sodium base absorbing liquid are defeated It send and second motive force pump is also equipped on pipe.
As a further improvement, demister is equipped in the desulfurizing tower, the oxidizing tower and the absorption tower, institute It states demister and is located at first spray tube or the top of second spray tube or the 3rd spray tube.
It is improved as further, oxidation solution conveying device is equipped between the oxidizing tower and the absorption tower.
As improvement further, the oxidation solution conveying device includes connecting with the delivery pipe on the oxidizing tower Oxidation solution recovery tube, the other end of the oxidation solution recovery tube connects with the 3rd spray tube, the oxidation solution recovery tube It is equipped with oxidation solution and recycles kinetic pump.
As improvement further, mixed liquor conveying device is equipped between the mixing concentration basin and the absorption tower.
As improvement further, the mixed liquor conveying device includes extending to the mixing in the mixing concentration basin Liquid recovery tube, the other end of the mixed liquor recovery tube are connected with the 3rd spray tube, and the mixed liquor recovery tube is equipped with Mixed liquor recycles kinetic pump.
Second aspect, the present invention provides the processing method for the waste gas containing VOC realized using the processing system, including such as Lower step：
(1) start entire processing system, be previously run 30-35 minutes；
(2) exhaust gas is entered from air inlet pipe in desulfurizing tower, the flow of exhaust gas is 2.1-2.4m3/ h is maintained in desulfurizing tower Temperature is 35-45 DEG C, and the flow of doctor solution is 5.7-6.5m3/ h, the flow of oxidation solution is 3.5-3.7m3/ h, sodium base absorbing liquid Flow is 1.5-1.7m3/ h, treated, and exhaust gas drains into photocatalytic degradation VOC units；
(3) exhaust gas that step (2) obtains is passed through mode in photocatalytic degradation VOC units using intermittent, is passed through every time Exhaust gas be detained in housing 1.5-2.3 minutes, treated, and exhaust gas drained into exhaust gas temporary storage tank temporarily stores；
(5) exhaust gas in step (3) in exhaust gas temporary storage tank is passed through to first isolated area of toroidal shell, switch board control Solenoid valve processed is opened 3-5 minutes, is then shut off solenoid valve, while starts stepper motor, and stepper motor drives conveyer belt stepping one The distance of a isolated area, switch board close stepper motor, opens solenoid valve 3-5 minutes, such iterative cycles；Solenoid valve is opened 3-5 minutes in, be continually fed into 75-85 DEG C of vapor from desorption steam inlet pipe, vapor is from desorption steam outlet pipe row Go out；
(6) tail gas is detected, is emptied after qualified；It is underproof, it is recycled to step (3) circular treatment.
Due to using the technology described above, the present invention has the advantages that：
The present invention is first with waste gas pre-treating device by sulfur dioxide, the NO in exhaust gasX, at the impurity such as dust Reason, then by treated, exhaust gas is directed into VOC processing units, carries out photocatalytic degradation, and remaining VOC is adsorbed, this hair It is bright to substantially increase the treatment effect containing VOC exhaust gas.
Description of the drawings
Fig. 1 is present device flow diagram；
Fig. 2 is the structure diagram of photocatalytic degradation VOC units；
Fig. 3 is the structure diagram for adsorbing VOC units；
Fig. 4 is the structure diagram of adsorbing agent carrier plate；
Fig. 5 is the equipment flowsheet schematic diagram of waste gas pre-treating device；
Fig. 6 is the anti-corrosion resistance to erosion reinforcement structure schematic diagram of desulfurizing tower；
Fig. 7 is the structure diagram of powder desulfurizing agent supply unit.
Wherein, each number designation refers to following concrete meaning, element and/or component respectively in the figure.
In figure：Housing 1, filter screen 2, level-one photocatalysis net 3, photocatalytic plate 4, two level photocatalysis net 5, ultraviolet lamp 6, ring Shape housing 7, adsorbing agent carrier plate 8, exhaust gas temporary storage tank 9, exhaust gas inlet pipe 10, waste gas outlet pipe 11, Waste gas inducing pipe 12, desorption Steam inlet pipe 13, desorption steam outlet pipe 14, switch board 15, partition plate 16, solenoid valve 17, stepper motor 18, desulfurizing tower 19, into Tracheae 20, oxidizing tower 21, absorption tower 22, exhaust pipe 23, the first snorkel 24, the second snorkel 25, doctor solution spray equipment 26, First tank body 27, doctor solution delivery pipe 28, the first kinetic pump 29, the first spray tube 30, the first nozzle 31, doctor solution 32, oxidation Liquid spray equipment 33, the second tank body 34, oxidation solution delivery pipe 35, the second kinetic pump 36, the second spray tube 37, the second nozzle 38, Oxidation solution 39, sodium base absorbing liquid spray equipment 40, the 3rd tank body 41, sodium base absorbing liquid delivery pipe 42, the 3rd kinetic pump the 43, the 3rd Spray tube 44, the 3rd nozzle 45, sodium base absorbing liquid 46, mixing concentration basin 47, sedimentation basin 48, coagulant add in pipe 49, flocculation aid Add in pipe 50, clear water reserviors 51, water circulating pump 52, delivery pipe 53, agitating shaft 54, agitating vane 55, second motive force pump 56, demister 57th, oxidation solution conveying device 58, oxidation solution recovery tube 59, oxidation solution recycling kinetic pump 60, mixed liquor conveying device 61, mixed liquor Recovery tube 62, mixed liquor recycling kinetic pump 63, motor 64, doctor solution preparation tank 65, desulfurizing agent raw material cabin 66, feed line 67th, weighing spiral feeder 68, the first feed lines 69, the first star-shaped feeding machine 70, electric gate valve 71, hand operated gate valve 72nd, the second feed lines 73, classified grinding machine 74, the 3rd feed lines 75, dust-precipitator 76, air-introduced machine 77, the 4th feed lines 78th, the second star-shaped feeding machine 79, transmitter 80, the 5th feed lines 81, flow control valve 82, the 6th feed lines 83, first Valve 84, conveying roots blower 85, the 7th feed lines 86, the second valve 87, spare conveying roots blower 88, alloy bolt 89th, alloy nut 90, alloy gasket 91, vinylite prime coat 92, first layer vinylite flake paint layer 93, first Wear-resisting type vinylite flake paint layer 94, the wear-resisting type vinyl of second layer supplying ceramic particle of layer supplying ceramic particle Resin flake dope layer 95, second layer vinylite flake paint layer 96, reinforced polypropylene wearing plate 97, FRP glass cloth 98, Diaphragm seal 99, adsorbent 100.
Specific embodiment
With reference to specific embodiment, the present invention is further described.But the purposes and mesh of these exemplary embodiments Be only used for enumerate the present invention, any type of any restriction not is formed to the real protection scope of the present invention, it is more non-to incite somebody to action this The protection domain of invention is confined to this.
Embodiment one
As shown in Figure 1, a kind of processing system of waste gas containing VOC, including waste gas pre-treating device and VOC processing units, The VOC processing units are connected to the downstream position of the waste gas pre-treating device, and the VOC processing units include being serially connected Photocatalytic degradation VOC units and absorption VOC units.
As shown in Fig. 2, in the present embodiment, the photocatalytic degradation VOC units include housing 1, filter screen 2, level-one light and urge Change net 3, photocatalytic plate 4 and two level photocatalysis net 5, the housing 1 enclose be set as exhaust gas by passage, the housing 1 sets There are air inlet and gas outlet；The filter screen 2 is arranged at the air inlet position, and the filter screen 2 is detachable is plugged in In one installation skeleton frame, the filter screen 2 is clamped in using clamping lever in the installation skeleton frame；The level-one photocatalysis net 3 Cross section is wavy, and the level-one photocatalysis net 3 and exhaust gas flow direction right angle setting, the level-one photocatalysis net 3 The left and right sides is mounted on ultraviolet lamp 6, using wavy photocatalysis net, can utilize limited space, as big as possible Increase the contact area of exhaust gas and photocatalysis net, and when wavy photocatalysis net sets ultraviolet lamp 6 in both sides, ultraviolet light Lamp 6 will not cast a shadow on photocatalysis net so that exhaust gas can carry out preliminary photocatalysis, and experiment proves, compared with planar junction The photocatalysis net of structure, the photocatalysis net efficiency of this structure improve 3-5%；The cross section of the photocatalytic plate 4 is polyline shaped, and The photocatalytic plate 4 installation parallel with exhaust gas flow direction, the both sides up and down of the photocatalytic plate 4 are mounted on ultraviolet lamp 6, And the grouping of ultraviolet lamp 6 is set, and the folding face of every group of ultraviolet lamp 6 and the photocatalytic plate 4 is oppositely arranged one by one, is used This structure is advantageous in that：1st, the contact area of exhaust gas and photocatalytic plate 4, the contact surface of exhaust gas and photocatalytic plate 4 are increased Product is big, can greatly improve the effect of catalysis；2nd, ultraviolet lighting is abundant, due to each face of ultraviolet lamp 6 and photocatalytic plate 4 All it is face, sufficient ultraviolet lighting, actual to prove, photocatalytic plate 4, the ultraviolet lamp of this structure can be carried out to each face 6 layout type can improve catalytic efficiency 10-13%.The photocatalytic plate 4 is coated with catalyst coatings using two surfaces Aluminum substrate, reflective insulation powder 10-15 parts by weight are prepared by following components in the catalyst coatings；Antirusting powder 5-7 parts by weight； Polyaniline corrosion inhibiter 15-25 parts by weight；Drier 3-5 parts by weight.In the present embodiment, then using Shanghai plumage and the limited public affairs of new material 803 reflective insulation powder, 12 parts by weight produced, 6 parts by weight of S15 antirusting powders, 20 parts by weight of polyaniline corrosion inhibiter, DR-313 is taken charge of to urge Dry 4 parts by weight of agent, 10 parts by weight of nanometer titanium dioxide titanium valve are prepared, during preparation：First by 803 reflective insulation powder, 12 weight Part, 6 parts by weight of S15 antirusting powders, 20 parts by weight of polyaniline corrosion inhibiter added in after weighing it is scattered to being stirred in stirred tank, then 10 parts by weight of nanometer titanium dioxide titanium valve are added in, accelerates stir speed (S.S.) and continues to stir, addition DR-313 is urged dry under last stirring 4 parts by weight of agent, obtain the material liquid of catalyst coatings, catalyst coatings of the present invention, and 803 reflective insulation powder enable to light Catalytic plate 4 does not generate excessively high temperature when ultraviolet lamp 6 irradiates so that photocatalysis carries out in suitable temperature environment, carries High catalytic effect, because inevitably with mordant substance in exhaust gas, antirusting powder, polyaniline corrosion inhibiter can be ensured that light The corrosion resistance of catalytic plate 4 greatly increases, and prolongs the service life, and when drier sprays in the early stage, enables to catalyst coatings fast Rapid-curing cutback is dry, it is ensured that the uniformity of catalyst coatings improves catalytic effect, nanometer titanium dioxide titanium valve as catalyst, above into Uniform disperse system can be formed in point, it is uniform with exhaust gas contact, realize catalytic effect；The two level photocatalysis net 5 it is transversal Face is wavy, and the two level photocatalysis net 5 and exhaust gas flow direction right angle setting, the left and right of the two level photocatalysis net 5 Both sides are mounted on ultraviolet lamp 6, and the level-one photocatalysis net 3 and two level photocatalysis net 5 are using cellular ceramic wafer, institute The surface spraying for stating ceramic wafer has titanium dioxide.Cellular ceramic wafer greatly improve exhaust gas by efficiency and contact surface Product.
As shown in Figure 3 and Figure 4, the absorption VOC units include toroidal shell 7, adsorbing agent carrier plate 8, exhaust gas temporary storage tank 9th, exhaust gas inlet pipe 10, waste gas outlet pipe 11, Waste gas inducing pipe 12, desorption steam inlet pipe 13,14 and of desorption steam outlet pipe Switch board 15, is equipped with the conveyer belt driven using stepper motor 18 inside the toroidal shell 7, and the toroidal shell 7 Inner utilization partition plate 16 is divided into several isolated areas；The adsorbing agent carrier plate 8 is installed on the conveyer belt, and the suction Attached agent carrier plate 8 is correspondingly arranged with each isolated area, and the both ends of the adsorbing agent carrier plate 8 are respectively provided with and the partition plate 16 Bottom edge realizes the diaphragm seal 99 of sealing, and diaphragm seal 99 protrudes from the plane of adsorbing agent carrier plate 8, the top of diaphragm seal 99 with 16 bottom of partition plate uses matched wedge structure, and diaphragm seal 99 selects soft rubber slab, in diaphragm seal 99 and partition plate When 16 bottoms touch, preferable leakproofness is realized, meanwhile, the other both sides of adsorbing agent carrier plate 8 are also equipped with the sealing of protrusion Edge so that each isolated area is a preferable cavity of leakproofness, will not be by exhaust gas leakage to other isolated areas.It is described useless Gas temporary storage tank 9 and 1 outlet of housing of the photocatalytic degradation VOC units, and the outlet of the exhaust gas temporary storage tank 9 is provided with Solenoid valve 17；One end of the exhaust gas inlet pipe 10 and the outlet of the exhaust gas temporary storage tank 9, the other end connect the annular One of isolated area of housing 7, exhaust gas is directed into toroidal shell 7；The Waste gas inducing pipe 12 connects separate One isolated area of the exhaust gas inlet pipe 10, exporting exhaust gas to outside toroidal shell 7；The Waste gas inducing pipe 12 has More, adjacent isolated area between connection exhaust gas inlet pipe 10, waste gas outlet pipe 11, and the adjacent Waste gas inducing pipe 12 Upper and lower interlaced arrangement (illustrate only the Waste gas inducing pipe 12 above toroidal shell 7, remaining Waste gas inducing pipe in Fig. 3 12 are located at the lower section of toroidal shell 7, are not shown in figure)；The desorption steam inlet pipe 13 connect not with the Waste gas inducing pipe The isolated area of 12 connections；The independent zones that desorption steam outlet pipe 14 connection is connected with the desorption steam inlet pipe 13 Domain, and be oppositely arranged with the desorption steam inlet pipe 13, the switch board 15 connects the stepper motor using pilot 18 and the solenoid valve 17, and the stepper motor 18 is controlled to drive conveyer belt step motion, the adsorbing agent carrier plate 8 is moved It moves to next isolated area, and the solenoid valve 17 is cut off while the stepper motor 18 works.Adsorb VOC units At work, introduce exhaust gas into first to toroidal shell 7, in first isolated area, exhaust gas first passes through absorption therein Agent carrier plate 8, the adsorbing agent carrier plate 8 are loaded with adsorbent 100, and the adsorbent uses modified active carbon fiber, described The preparation method of modified active carbon fiber is：When by activated carbon fibre, freeze-day with constant temperature 1 is small under the conditions of 120 DEG C in drying box, use 30% (W/V) hydrogen peroxide dipping 64h, then, each 25min, to wash off remaining hydrogen peroxide. with distilled water immersion three times.Then Constant temperature drying under the conditions of 100 DEG C is placed in drying box；Substantial amounts of Graphitic carbon structure is aoxidized by H2O2, is contained in modified active carbon fiber Oxygen functional group total amount increases.Wherein, there are a certain amount of increase in carbonyl (C=O) functional group and carboxyl (- COO) functional group, alcohol (- OH) then substantially increase with ether (C-O-C) functional group content.The increase of front and rear oxygen-containing functional group relative amount, causes suction of the present invention The attached dose of adsorption capacity to VOC enhances；By first adsorbing agent carrier plate 8 treated exhaust gas, Waste gas inducing pipe can be passed through 12 are handled into second adsorbing agent carrier plate 8, successively by the adsorbing agent carrier plate 8 of multiple isolated areas, are finally located Exhaust gas after the completion of reason is discharged through Waste gas inducing pipe 12, is emptied after detection is qualified；By above description it is recognised that along exhaust gas Flow direction, adsorbent continuously decreases VOC adsorption saturation degree in each isolated area, connects with exhaust inlet pipe 20 Adsorbent in logical isolated area is to VOC adsorption saturation degree highests；During the treatment, at regular intervals, switch board 15 will control stepper motor 18 that conveyer belt is driven to move a distance, will connect the VOC in 20 isolated area of exhaust inlet pipe The higher adsorbing agent carrier plate 8 of adsorption saturation degree moves forward, the higher adsorbing agent carrier plate 8 of this part VOC adsorption saturation degree The isolated area being connected with being desorbed steam inlet pipe 13 will be moved to, carries out desorption processing, meanwhile, another piece of VOC absorption is full It moves forward to and is connected in 20 isolated area of exhaust inlet pipe with the adsorbing agent carrier plate 8 for spending relatively low, be desorbed completion Adsorbing agent carrier plate 8 move forward to connection exhaust gas air outlet pipe isolated area in.In such manner, it is possible to it is sequentially reduced using saturation degree Adsorbent multiple adsorption treatment is carried out to exhaust gas, VOC ingredients remaining in exhaust gas are adsorbed to greatest extent.It also ensures whole The operation continuity of a device replaces adsorbent without shutting down.
As shown in figure 5, the waste gas pre-treating device includes desulfurizing tower 19, the bottom of the desulfurizing tower 19 is equipped with air inlet pipe 20, the downstream of the desulfurizing tower 19 is equipped with oxidizing tower 21 and absorption tower 22 successively, the desulfurizing tower 19 and the oxidizing tower 21 it Between be equipped with the first snorkel 24, the both ends of first snorkel 24 respectively with the top of the desulfurizing tower 19 and the oxidizing tower 21 bottom connection, is equipped with the second snorkel 25, second snorkel 25 between the oxidizing tower 21 and the absorption tower 22 Bottom of the both ends respectively with the top of the oxidizing tower 21 and the absorption tower 22 connect, the top on the absorption tower 22 is equipped with Exhaust pipe 23, the exhaust pipe 23 are connected with 7 entrance of toroidal shell of the photocatalytic degradation VOC units；The desulfurizing tower 19 On be additionally provided with doctor solution spray equipment 26, oxidation solution spray equipment 33 is additionally provided on the oxidizing tower 21, on the absorption tower 22 It is additionally provided with sodium base absorbing liquid spray equipment 40.Flue gas multi-stage spray desulphurization and denitration, dust removal integrated plant are in practical application In, the flue gas of discharge enters desulfurizing tower 19, the doctor solution 32 and cigarette that doctor solution spray equipment 26 sprays out afterwards by air inlet pipe 20 Gas is contacted and chemically reacted, remove flue gas in SO2 and dust, in this process, can have 95% desulfuration efficiency and More than 60% efficiency of dust collection, meanwhile, spray can reduce flue-gas temperature, and flue-gas temperature is reduced to 50-70 DEG C；Afterwards, flue gas Oxidizing tower 21 is entered by the first snorkel 24, the oxidation solution 39 (hydrogen peroxide) that oxidation solution spray equipment 33 sprays connects with flue gas It touches and is chemically reacted, the NO of flue gas middle or low price state will be aoxidized, be oxidized to the NOX of high-valence state, afterwards, flue gas passes through second Snorkel 25 enters absorption tower 22, the dust technology and NOX and sodium of the high-valence state being oxidized in desulfurizing tower 19 and oxidizing tower 21 Sodium base absorbing liquid 46 that base absorbing liquid spray equipment 40 sprays out occurs neutralization reaction and is removed that (NOX is fixed life Into sodium nitrate, SO2, which is fixed, generates sodium sulphate), photocatalytic degradation VOC units are drained by exhaust pipe 23 afterwards.It is described Doctor solution spray equipment 26 includes the first tank body 27, and doctor solution 32, first tank body 27 are loaded in first tank body 27 Doctor solution delivery pipe 28 is equipped between the desulfurizing tower 19, the doctor solution delivery pipe 28 is equipped with the first kinetic pump 29；Institute The first spray tube 30 for being equipped in desulfurizing tower 19 and being connected with the doctor solution delivery pipe 28 is stated, first spray tube 30 is close to institute The top for stating desulfurizing tower 19 is set, and first spray tube 30 is equipped with several first nozzles 31；The oxidation solution spray equipment 33 include the second tank body 34, and oxidation solution 39, second tank body 34 and the oxidizing tower 21 are loaded in second tank body 34 Between be equipped with oxidation solution delivery pipe 35, the oxidation solution delivery pipe 35 be equipped with the second kinetic pump 36；It is set in the oxidizing tower 21 There is the second spray tube 37 connected with the oxidation solution delivery pipe 35, second spray tube 37 is close to the top of the oxidizing tower 21 Portion is set, and second spray tube 37 is equipped with several second nozzles 38；The sodium base absorbing liquid spray equipment 40 includes the 3rd Tank body 41 is loaded with sodium base absorbing liquid 46 in the 3rd tank body 41, is set between the 3rd tank body 41 and the absorption tower 22 There is sodium base absorbing liquid delivery pipe 42, the sodium base absorbing liquid delivery pipe 42 is equipped with the 3rd kinetic pump 43；In the absorption tower 22 Equipped with the 3rd spray tube 44 connected with the sodium base absorbing liquid delivery pipe 42, the 3rd spray tube 44 is close to the absorption tower 22 top is set, and the 3rd spray tube 44 is equipped with several 3rd nozzles 45；First tank body 27, second tank body 34 and the 3rd tank body 41 on be equipped with motor 64 driving agitating shaft 54, the agitating shaft 54 be equipped with agitating vane 55.When conveying doctor solution 32, the first kinetic pump 29 is defeated by doctor solution delivery pipe 28 by the doctor solution 32 in the first tank body 27 It send to the first spray tube 30, is sprayed by the first nozzle 31 and reacted with flue gas afterwards, similarly, realize oxidation solution 39 and sodium The conveying of base absorbing liquid 46, simple in structure, spraying effect is good.By agitating shaft 54 and agitating vane 55, ensure that doctor solution 32, The uniformity of oxidation solution 39 and sodium base absorbing liquid 46 is to carry out fully reaction with flue gas to lay a good foundation.
Waste gas pre-treating device further includes mixing concentration basin 47, and the one side of the mixing concentration basin 47 is equipped with sedimentation basin 48, The one side of the sedimentation basin 48 is equipped with clear water reserviors 51, and the clear water reserviors 51 are equipped with water circulating pump 52；It is set on the sedimentation basin 48 There is coagulant to add in pipe 49 and flocculation aid addition pipe 50；The desulfurizing tower 19, the oxidizing tower 21 and the bottom on the absorption tower 22 Portion is communicated with delivery pipe 53, and the other end of the delivery pipe 53 is extended in the mixing concentration basin 47.In above process, Flue gas can remove the dust contained in part of smoke while passing through three towers, also can play the role of flue gas cool-down；Spray Doctor solution 32, oxidation solution 39 and the absorbing liquid gone out is emitted by delivery pipe 53 in mixing concentration basin 47, in mixing concentration basin 47 It adds in alkali and enters sedimentation basin 48 after carrying out mixing concentration, (pipe 49 is added in sedimentation basin 48 by coagulant and flocculation aid adds Enter pipe 50) addition coagulant, the medicaments such as flocculation aid, by dust settling, in clear liquid overflow to clear water reserviors 51, and pass through water circulating pump 52 are recycled.
Due to the complicated component in exhaust gas, 19 serious corrosion of desulfurizing tower, in actual use, the desulfurization of metallic matrix Inner wall of tower and its protective layer (especially spraying zone) are washed away for a long time by high flow rate, high solids slurries, in turn result in erosion corrosion, The generation of perforated phenomenon can be not only largely effected on using mission, but also needs periodically to carry out maintenance (to the position of burn into perforation Carry out reinforcement repairing), normal production work is influenced, very big hidden danger is brought to desulphurization system safe operation, while can waste Substantial amounts of human and material resources.As shown in fig. 6, there is anti-corrosion resistance to erosion reinforcement structure in the desulfurizing tower 19, in the desulfurizing tower 19 Inner wall on be welded with several alloy bolts 89, the alloy bolt 89 in the circumferential direction of the desulfurizing tower 19 and in axial direction Array is set；It ensure that reinforced polypropylene wearing plate 97 has good stationarity in 19 body of desulfurizing tower, and it is poly- convenient for enhancing The processing in hole (hole passed through for alloy bolt 89) on propylene wearing plate 97；Alloy is set on all alloy bolts 89 Gasket 91, the alloy gasket 91 is between the alloy nut 90 and the reinforced polypropylene wearing plate 97, and the conjunction Together with the both sides of gold pad piece 91 closely abut against respectively with the alloy nut 90 and the reinforced polypropylene wearing plate 97；So as to It is abutted against by the big alloy gasket 91 of area with reinforced polypropylene wearing plate 97, effectively increases fastening effect；Meanwhile it avoids During alloy 90 rotational fastener of nut, reinforced polypropylene wearing plate 97 is caused to wear.Positioned at all alloy bolts 89 weeks Vinylite prime coat 92 is brushed or is coated on 19 inner wall of the desulfurizing tower on side, on the vinylite prime coat 92 First layer vinylite flake paint layer 93 is brushed or be coated with, is applied on the first layer vinylite flake paint layer 93 Brush or be coated with the wear-resisting type vinylite flake paint layer 94 of first layer supplying ceramic particle, the first layer supplying ceramics The wear-resisting type second of second layer supplying ceramic particle is brushed or is coated on the wear-resisting type vinylite flake paint layer 94 of particle Ene based resins flake paint layer 95, the second layer are incorporated on the wear-resisting type vinylite flake paint layer 95 of ceramic particle and are applied Second layer vinylite flake paint layer 96 is brushed or is coated with, the second layer vinylite flake paint layer 96 is equipped with Reinforced polypropylene wearing plate 97, all alloy bolts 89 pass through the reinforced polypropylene wearing plate 97, and all conjunctions Gold shell bolt 89 is combined with alloy nut 90, and all alloy nuts 90 are closely pushed up with the reinforced polypropylene wearing plate 97 It is close together；The wear-resisting type vinylite flake paint layer 94 of the first layer supplying ceramic particle and second layer supplying FRP glass cloth 98 is bonded between the wear-resisting type vinylite flake paint layer 95 of ceramic particle.The desulfurizing tower 19 uses anti-corrosion Resistance to erosion reinforcement structure in actual use, passes through vinylite prime coat 92, first layer vinylite flake paint layer 93rd, the wear-resisting type vinylite flake paint layer 94 of first layer supplying ceramic particle, FRP glass cloth 98, second layer supplying pottery The wear-resisting type vinylite flake paint layer 95 and second layer vinylite flake paint layer 96 of porcelain particle form erosion resistant coating, Anticorrosion antiwear layer is formed by reinforced polypropylene wearing plate 97 and passes through the inner wall that alloy nut 90 is fastened to 19 body of desulfurizing tower On.Using the desulfurizing tower 19 anti-corrosion resistance to erosion reinforcement structure, the service life for substantially increasing 19 body of desulfurizing tower (is more than 15 Year), and favorable anti-corrosion effect, it solves erosion corrosion, the generation of perforated phenomenon, ensure that normal production work and desulphurization system Safe operation；In addition, anticorrosion antiwear layer is safeguarded simply, it is only necessary to it is wear-resisting to unclamp the reinforced polypropylene that alloy nut 90 more renews Plate 97.Wherein, the first layer vinylite flake paint layer 93 and the second layer vinylite flake paint The thickness of layer 96 is all higher than or equal to 0.8mm；The wear-resisting type vinylite flake paint of the first layer supplying ceramic particle The thickness of the wear-resisting type vinylite flake paint layer 95 of layer 94 and second layer supplying ceramic particle is all higher than or is equal to 1mm；The thickness of the FRP glass cloth 98 is greater than or equal to 1mm；The thickness of the reinforced polypropylene wearing plate 97 is greater than or equal to 5mm；By above-mentioned size, not only 19 body of desulfurizing tower will not be damaged or be increased burden, but also do not interfered with normal Desulfurization works；Meanwhile provide guarantee to realize good anti-corrosion effect, improving service life.
In the present invention, the doctor solution delivery pipe 28, the oxidation solution delivery pipe 35 and the sodium base absorbing liquid delivery pipe Second motive force pump 56 is also equipped on 42.By second motive force pump 56, be doctor solution 32, oxidation solution 39 and sodium base absorbing liquid 46 from Lower is smoothly delivered to eminence and provides guarantee.
First tank body 27 connects a doctor solution preparation tank 65, and blender is equipped in the doctor solution preparation tank 65, described Doctor solution preparation tank 65 offers water inlet and powder desulfurizing agent adds in mouth, and powder desulfurizing agent adds in mouth connection powder desulfurizing agent Supply unit.
Whether desulfurizing agent dissolves fully very crucial in doctor solution, and it is single that inventor devises dedicated powder desulfurizing agent supply Powder desulfurizing agent is quantified, enters doctor solution preparation tank 65 after crushing, doctor solution is prepared, it is ensured that the matter of doctor solution by member Amount.As shown in fig. 7, powder desulfurizing agent supply unit includes desulfurizing agent raw material cabin 66, the lower section of the desulfurizing agent raw material cabin 66 is set There is weighing spiral feeder 68, the first feed pipe is equipped between the desulfurizing agent raw material cabin 66 and the weighing spiral feeder 68 Road 69, first feed lines 69 are equipped with the first star-shaped feeding machine 70, and the lower section of first star-shaped feeding machine 70 passes through Second feed lines 73 are communicated with classified grinding machine 74, and the discharge end of the classified grinding machine 74 is connected by the 3rd feed lines 75 Dust-precipitator 76 is connected with, the dust-precipitator 76 is equipped with air-introduced machine 77；The lower section of the dust-precipitator 76 passes through the 4th feed lines 78 Transmitter 80 is communicated with, the 4th feed lines 78 are equipped with the second star-shaped feeding machine 79, and the transmitter 80 passes through the 5th Feed lines 81 are connected with desulfurizing tower 19；The transmitter 80 is also communicated with conveying roots blower by the 6th feed lines 83 85.It is star-like through dropping down onto first under the first feed lines 69 that apparatus above will be stored in desulfurizing agent raw material (between -250 mesh of 160 mesh) Desulfurizing agent raw material is uniformly delivered to weighing spiral feeder 68, afterwards by batcher 70 by the first star-shaped feeding machine 70 afterwards By 73 weighing spiral feeder 68 of the second feed lines by desulfurizing agent feedstock transportation to classified grinding machine 74, desulfurizing agent is former afterwards Material carries out fine gtinding (desulfurizer powder after grinding is about 600 mesh) in classified grinding machine 74, passes through air-introduced machine 77 afterwards By in desulfurizer powder (through the 3rd feed lines 75) suction and conveying to dust-precipitator 76 after grinding, desulfurizer powder is in dust-precipitator 76 It falls and stores and pass through the 4th feed lines 78 and send to the second star-shaped feeding machine 79, in above process, classified grinding machine 74 It runs for negative pressure, calm leakage, therefore is also revealed without dust；Afterwards, the second star-shaped feeding machine 79 uniformly conveys desulfurizer powder To transmitter 80, convey afterwards roots blower 85 desulfurizer powder in transmitter 80 is blowed (through the 5th feed lines 81) it is de- Sulphur liquid preparation tank 65, powder desulfurizing agent dissolves rapidly in doctor solution preparation tank 65.5th feed lines 81 are equipped with stream Adjustable valve 82 according to actual needs, controls (after fine gtinding) powder desulfurizing agent to enter doctor solution by flow control valve 82 Flow in preparation tank 65 effectively prevents excessive powder desulfurizing agent and enters in doctor solution preparation tank 65 and cause doctor solution dense Spend height, caused by waste.The 7th feed lines 86, the 7th feed lines are communicated on 5th feed lines 81 86 are equipped with spare conveying roots blower 88；The first valve 84, first valve are additionally provided on 6th feed lines 83 84 are located between the conveying roots blower 85 and the transmitter 80；The second valve is additionally provided on 7th feed lines 86 87, second valve 87 is located between the spare conveying roots blower 88 and the transmitter 80, and the 7th feeding The connectivity part of pipeline 86 and the 5th feed lines 81 is between first valve 84 and the transmitter 80；It realizes (the first valve 84 is closed) in the case where conveying roots blower 85 breaks down, by spare conveying roots blower 88 still Powder desulfurizing agent can be conveyed (the second valve 87 is in opening at this time), it is simple in structure, it ensure that being normally carried out for work； Meanwhile coordinated by the first valve 84 and the second valve 87, it ensure that conveying roots blower 85 and spare conveying roots blower 88 The two is independent of each other.First feed pipe between the desulfurizing agent raw material cabin 66 and first star-shaped feeding machine 70 Road 69 is equipped with electric gate valve 71, by electric gate valve 71 realize desulfurizing agent raw material cabin 66 and weighing spiral feeder 68 it Between partition, avoid in a non-operative state, desulfurizing agent raw material is always toward the first star-shaped feeding machine in desulfurizing agent raw material cabin 66 70 directions fall and block the first star-shaped feeding machine 70.Hand operated gate valve 72 is additionally provided on first feed lines 69, it is described Hand operated gate valve 72 is between the electric gate valve 71 and the desulfurizing agent raw material cabin 66.On the desulfurizing agent raw material cabin 66 Feed line 67 is communicated with, the connection of desulfurizing agent raw material cabin 66 and waggon is realized by feed line 67, convenient for conveying Interior desulfurizing agent raw material is fed directly in desulfurizing agent raw material cabin 66, is avoided manually de- toward the interior conveying of desulfurizing agent raw material cabin 66 The problem of sulphur agent raw material.
In addition, demister 57 is equipped in the desulfurizing tower 19 of the present invention, the oxidizing tower 21 and the absorption tower 22, it is described Demister 57 is located at first spray tube 30 or the top of second spray tube 37 or the 3rd spray tube 44.By removing Day with fog 57 is used to remove the big droplet carried in flue gas.It is defeated that oxidation solution is equipped between the oxidizing tower 21 and the absorption tower 22 Send device 58.The oxidation solution 39 in oxidizing tower 21 is delivered in absorption tower 22 by oxidation solution conveying device 58 and carries out secondary make With will aoxidize the NO of remaining lower valency in flue gas, and be oxidized to the NOX of high-valence state.The oxidation solution conveying device 58 include with The oxidation solution recovery tube 59 that the delivery pipe 53 connects on the oxidizing tower 21, the other end of the oxidation solution recovery tube 59 and institute It states the 3rd spray tube 44 to connect, the oxidation solution recovery tube 59 is equipped with oxidation solution and recycles kinetic pump 60, simple in structure, conveying effect Fruit is good.Mixed liquor conveying device 61 is equipped between the mixing concentration basin 47 and the absorption tower 22.It is conveyed and filled by mixed liquor It puts 61 and mixed liquor in mixing concentration basin 47 is delivered to the secondary use of progress in absorption tower 22, utilize the doctor solution 32 in mixed liquor Remove remaining SO2, the NO of remaining lower valency in flue gas will be aoxidized using the oxidation solution 39 in mixed liquor, is oxidized to high-valence state NOX.The mixed liquor conveying device 61 includes extending to the mixed liquor recovery tube 62 in the mixing concentration basin 47, described mixed The other end for closing liquid recovery tube 62 is connected with the 3rd spray tube 44, and the mixed liquor recovery tube 62 is recycled equipped with mixed liquor Kinetic pump 63.
Embodiment two
The processing method of waste gas containing VOC, includes the following steps：
(1) start the entire processing system of embodiment one, be previously run 30 minutes；
(2) exhaust gas is entered from air inlet pipe in desulfurizing tower, the flow of exhaust gas is 2.1m3/ h maintains the temperature in desulfurizing tower For 35 DEG C, the flow of doctor solution is 5.7m3/ h, the flow of oxidation solution is 3.5m3/ h, the flow of sodium base absorbing liquid is 1.5m3/ h, Treated, and exhaust gas drains into photocatalytic degradation VOC units；
(3) exhaust gas that step (2) obtains is passed through mode in photocatalytic degradation VOC units using intermittent, is passed through every time Exhaust gas be detained in housing 1.5 minutes, treated, and exhaust gas drained into exhaust gas temporary storage tank temporarily stores；
(5) exhaust gas in step (3) in exhaust gas temporary storage tank is passed through to first isolated area of toroidal shell, switch board control Solenoid valve processed is opened 3 minutes, is then shut off solenoid valve, while starts stepper motor, and stepper motor drives conveyer belt stepping one The distance of isolated area, switch board close stepper motor, opens solenoid valve 3 minutes, such iterative cycles；The 3 of solenoid valve unlatching In minute, 75 DEG C of vapor is continually fed into from desorption steam inlet pipe, vapor is discharged from desorption steam outlet pipe；
(6) tail gas is detected, is emptied after qualified.
Embodiment three
The processing method of waste gas containing VOC, includes the following steps：
(1) start the entire processing system of embodiment one, be previously run 35 minutes；
(2) exhaust gas is entered from air inlet pipe in desulfurizing tower, the flow of exhaust gas is 2.4m3/ h maintains the temperature in desulfurizing tower For 45 DEG C, the flow of doctor solution is 6.5m3/ h, the flow of oxidation solution is 3.7m3/ h, the flow of sodium base absorbing liquid is 1.7m3/ h, Treated, and exhaust gas drains into photocatalytic degradation VOC units；
(3) exhaust gas that step (2) obtains is passed through mode in photocatalytic degradation VOC units using intermittent, is passed through every time Exhaust gas be detained in housing 2.3 minutes, treated, and exhaust gas drained into exhaust gas temporary storage tank temporarily stores；
(5) exhaust gas in step (3) in exhaust gas temporary storage tank is passed through to first isolated area of toroidal shell, switch board control Solenoid valve processed is opened 5 minutes, is then shut off solenoid valve, while starts stepper motor, and stepper motor drives conveyer belt stepping one The distance of isolated area, switch board close stepper motor, opens solenoid valve 5 minutes, such iterative cycles；The 5 of solenoid valve unlatching In minute, 75-85 DEG C of vapor is continually fed into from desorption steam inlet pipe, vapor is discharged from desorption steam outlet pipe；
(6) tail gas is detected, is emptied after qualified.
Example IV
The processing method of waste gas containing VOC, includes the following steps：
(1) start the entire processing system of embodiment one, be previously run 33 minutes；
(2) exhaust gas is entered from air inlet pipe in desulfurizing tower, the flow of exhaust gas is 2.3m3/ h maintains the temperature in desulfurizing tower For 40 DEG C, the flow of doctor solution is 6.1m3/ h, the flow of oxidation solution is 3.6m3/ h, the flow of sodium base absorbing liquid is 1.6m3/ h, Treated, and exhaust gas drains into photocatalytic degradation VOC units；
(3) exhaust gas that step (2) obtains is passed through mode in photocatalytic degradation VOC units using intermittent, is passed through every time Exhaust gas be detained in housing 2 minutes, treated, and exhaust gas drained into exhaust gas temporary storage tank temporarily stores；
(5) exhaust gas in step (3) in exhaust gas temporary storage tank is passed through to first isolated area of toroidal shell, switch board control Solenoid valve processed is opened 4 minutes, is then shut off solenoid valve, while starts stepper motor, and stepper motor drives conveyer belt stepping one The distance of isolated area, switch board close stepper motor, opens solenoid valve 4 minutes, such iterative cycles；The 4 of solenoid valve unlatching In minute, 75-85 DEG C of vapor is continually fed into from desorption steam inlet pipe, vapor is discharged from desorption steam outlet pipe；
(6) tail gas is detected, is emptied after qualified.
A coal-burning power plant is selected, the waste gas collecting gas sample detection that 5 time points of random selection discharge it, and detection is tied Fruit is averaged and (is denoted as blank group).
Photocatalysis treatment (being denoted as contrast groups A) directly is carried out to its exhaust gas, directly carrying out adsorption treatment to its exhaust gas (is denoted as Contrast groups B), photocatalysis treatment+adsorption treatment (contrast groups C).Wherein, photocatalysis treatment uses traditional Titanium Dioxide Agent, adsorption treatment use acticarbon.Gather gas sample detection.
Coal-burning power plant will be gathered by gas sample detection using the method for embodiment two, three, four after exhaust-gas treatment.
As a result such as following table：
As can be seen from the above results, the processing method that embodiment two, three, four provides, to the powder in coal-burning power plant's exhaust gas Dirt, SO2、NOXIt is effectively treated, it is often more important that, it is very good for the treatment effect of VOC, and the effect of example IV is most It is good.
And contrast groups A, contrast groups B use merely photocatalysis treatment, adsorption treatment, the content of VOC decreases, still It reduces not apparent enough.Likewise, contrast groups C is also bad to the treatment effect of VOC.Can illustrate, the present invention first by dust, SO2、NOXIt is effectively treated, then in conjunction with specific VOC light degradation unit and absorbing unit, the place of VOC can be greatly improved Effect is managed, there is significant progress.
It should be appreciated that the purposes of these embodiments is merely to illustrate the present invention and is not intended to the protection model of the limitation present invention It encloses.In addition, it should also be understood that, after reading the technical contents of the present invention, those skilled in the art can make the present invention each Kind change, modification and/or variation, all these equivalent forms equally fall within the guarantor that the application the appended claims are limited Within the scope of shield.

Claims (10)

1. a kind of processing system of waste gas containing VOC, it is characterised in that：Including
Waste gas pre-treating device,
And VOC processing units, the VOC processing units are connected to the downstream position of the waste gas pre-treating device, the VOC Processing unit includes the photocatalytic degradation VOC units being serially connected and absorption VOC units.
2. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：The photocatalytic degradation VOC unit bags It includes
Housing, the housing enclose be set as exhaust gas by passage, the housing is provided with air inlet and gas outlet；
Filter screen, the filter screen are arranged at the air inlet position, and the filter screen is detachable is plugged in an installing frame In seat；
Level-one photocatalysis net, the cross section of the level-one photocatalysis net are wavy, and the level-one photocatalysis net and waste gas stream Direction right angle setting is moved, ultraviolet lamp is mounted at left and right sides of the level-one photocatalysis net；
Photocatalytic plate, the cross section of the photocatalytic plate are polyline shaped, and photocatalytic plate peace parallel with exhaust gas flow direction Dress, the both sides up and down of the photocatalytic plate are mounted on ultraviolet lamp, and ultraviolet lamp grouping is set, every group of ultraviolet light The folding face of lamp and the photocatalytic plate is oppositely arranged one by one；
And two level photocatalysis net, the cross section of the two level photocatalysis net is wavy, and the two level photocatalysis net is with giving up Flow of air direction right angle setting is mounted on ultraviolet lamp at left and right sides of the two level photocatalysis net.
3. the processing system of waste gas containing VOC as claimed in claim 2, it is characterised in that：The filter screen utilizes clamping lever It is clamped in the installation skeleton frame.
4. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：The level-one photocatalysis net and two level For photocatalysis net using cellular ceramic wafer, the surface spraying of the ceramic wafer has titanium dioxide.
5. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：The photocatalytic plate uses two tables Face is coated with the aluminum substrate of catalyst coatings.
6. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：The absorption VOC units include
Toroidal shell is equipped with inside the toroidal shell using stepper motor driven conveyer belt, and the toroidal shell Inner utilization partition plate is divided into several isolated areas；
Adsorbing agent carrier plate, the adsorbing agent carrier plate are installed on the conveyer belt, and the adsorbing agent carrier plate with often A isolated area is correspondingly arranged, and the both ends of the adsorbing agent carrier plate are respectively provided with realizes the close of sealing with the partition plate bottom edge Mounting；
Exhaust gas temporary storage tank, the exhaust gas temporary storage tank is connected with the housing outlets of the photocatalytic degradation VOC units, and the exhaust gas The outlet of temporary storage tank is provided with solenoid valve；
Exhaust gas inlet pipe, the outlet of one end of the exhaust gas inlet pipe and the exhaust gas temporary storage tank, described in other end connection One of isolated area of toroidal shell, exhaust gas is directed into toroidal shell；
Waste gas outlet pipe, an isolated area of the Waste gas inducing pipe connection away from the exhaust gas inlet pipe, to by exhaust gas It exports to outside toroidal shell；
Waste gas inducing pipe, the Waste gas inducing pipe have more, adjacent independent zones between connection exhaust gas inlet pipe, waste gas outlet pipe Domain, and interlaced arrangement above and below the adjacent Waste gas inducing pipe；
It is desorbed steam inlet pipe, the isolated area that the desorption steam inlet pipe connection does not connect with the Waste gas inducing pipe；
And desorption steam outlet pipe, the independent zones that the desorption steam outlet pipe connection is connected with the desorption steam inlet pipe Domain, and be oppositely arranged with the desorption steam inlet pipe.
7. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：The absorption VOC units further include control Cabinet processed, the switch board connects the stepper motor and the solenoid valve using pilot, and controls the stepper motor band Dynamic conveyer belt step motion, the adsorbing agent carrier plate is moved in next isolated area, and in the stepper motor work As while cut off the solenoid valve.
8. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：The adsorbing agent carrier plate is loaded with Adsorbent, the adsorbent use modified active carbon fiber.
9. the processing system of waste gas containing VOC as described in claim 1, it is characterised in that：, the waste gas pre-treating device includes Desulfurizing tower, the bottom of the desulfurizing tower are equipped with air inlet pipe, and the downstream of the desulfurizing tower is equipped with oxidizing tower and absorption tower successively, described It is equipped with the first snorkel between desulfurizing tower and the oxidizing tower, the both ends of first snorkel top with the desulfurizing tower respectively Portion is connected with the bottom of the oxidizing tower, and the second snorkel is equipped between the oxidizing tower and the absorption tower, and described second is logical Bottom of the both ends of tracheae respectively with the top of the oxidizing tower and the absorption tower connects, and the top on the absorption tower is equipped with row Tracheae, the exhaust pipe are connected with the housing inlet port of the photocatalytic degradation VOC units；Doctor solution is additionally provided on the desulfurizing tower Spray equipment is additionally provided with oxidation solution spray equipment on the oxidizing tower, and sodium base absorbing liquid spray dress is additionally provided on the absorption tower It puts；Mixing concentration basin is further included, the one side of the mixing concentration basin is equipped with sedimentation basin, and the one side of the sedimentation basin is equipped with clear water Pond, the clear water reserviors are equipped with water circulating pump；The sedimentation basin is equipped with coagulant and adds in pipe and flocculation aid addition pipe；It is described de- The bottom of sulphur tower, the oxidizing tower and the absorption tower is communicated with delivery pipe, and the other end of the delivery pipe extends to described It mixes in concentration basin.
10. utilize the processing method for the waste gas containing VOC realized such as any one of claim 1-9 processing system, it is characterised in that：Bag Include following steps：
(1) start entire processing system, be previously run 30-35 minutes；
(2) exhaust gas is entered from air inlet pipe in desulfurizing tower, the flow of exhaust gas is 2.1-2.4m3/ h, maintain desulfurizing tower in temperature be 35-45 DEG C, the flow of doctor solution is 5.7-6.5m3/ h, the flow of oxidation solution is 3.5-3.7m3/ h, the flow of sodium base absorbing liquid are 1.5-1.7m3/ h, treated, and exhaust gas drains into photocatalytic degradation VOC units；
(3) exhaust gas that step (2) obtains is passed through mode in photocatalytic degradation VOC units using intermittent, and what is be passed through every time is useless Gas is detained 1.5-2.3 minutes in housing, and treated, and exhaust gas drained into exhaust gas temporary storage tank temporarily stores；
(5) exhaust gas in step (3) in exhaust gas temporary storage tank is passed through to first isolated area of toroidal shell, switch board control electricity Magnet valve is opened 3-5 minutes, is then shut off solenoid valve, while starts stepper motor, and stepper motor drives conveyer belt stepping one solely The distance in vertical region, switch board close stepper motor, opens solenoid valve 3-5 minutes, such iterative cycles；The 3- that solenoid valve is opened In 5 minutes, 75-85 DEG C of vapor is continually fed into from desorption steam inlet pipe, vapor is discharged from desorption steam outlet pipe；
(6) tail gas is detected, is emptied after qualified；It is underproof, it is recycled to step (3) circular treatment.
CN201711317708.XA 2017-12-12 2017-12-12 VOC (volatile organic compound) -containing waste gas treatment system and treatment method realized by using system Active CN108043185B (en)

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Publication number Priority date Publication date Assignee Title
CN108905618A (en) * 2018-07-24 2018-11-30 王鹏 A kind of VOC photocatalysis apparatus
CN108905619A (en) * 2018-07-24 2018-11-30 王鹏 A kind of administering method of industrial waste gas
WO2023076328A1 (en) * 2021-10-26 2023-05-04 Donaldson Company, Inc. Chemical filter assemblies

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CN204891568U (en) * 2015-08-18 2015-12-23 江苏一同环保工程技术有限公司 Boiler flue gas integration distributing type SOx/NOx control device
CN106693573A (en) * 2016-12-01 2017-05-24 易能环境技术有限公司 Purifying device and method for spraying industry VOCs exhaust gas
CN206483176U (en) * 2017-02-24 2017-09-12 韩志军 Horizontal runner VOCs adsorptive purifiers

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CN204447570U (en) * 2015-02-17 2015-07-08 宁国市志诚机械制造有限公司 A kind of photochemical catalytic oxidation waste gas treatment equipment
CN204891568U (en) * 2015-08-18 2015-12-23 江苏一同环保工程技术有限公司 Boiler flue gas integration distributing type SOx/NOx control device
CN106693573A (en) * 2016-12-01 2017-05-24 易能环境技术有限公司 Purifying device and method for spraying industry VOCs exhaust gas
CN206483176U (en) * 2017-02-24 2017-09-12 韩志军 Horizontal runner VOCs adsorptive purifiers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108905618A (en) * 2018-07-24 2018-11-30 王鹏 A kind of VOC photocatalysis apparatus
CN108905619A (en) * 2018-07-24 2018-11-30 王鹏 A kind of administering method of industrial waste gas
CN108905619B (en) * 2018-07-24 2021-02-02 山东乐辰节能环保科技有限公司 Treatment method of industrial waste gas
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WO2023076328A1 (en) * 2021-10-26 2023-05-04 Donaldson Company, Inc. Chemical filter assemblies

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